Advanced defensive metrics over two weeks tells you very little about the skill of a player. It's like looking at a players batting line after a week. Furthermore, it barely even tells you WHAT has happened. These defensive metrics have an extra layer of uncertainty over a batting line. I single is a single, a double is a double. Nothing to argue about. Defensive metrics are different in that they attempt to estimate the odds of an average defender making a particular play. There is a certain level of uncertainty in the data used to make that estimate (trajectory and speed). As long as that uncertainty is unbiased, that uncertainty will wash away with a large enough sample. In a small sample, they don't, though. Long story short, I wouldn't use two weeks of any play-by-play defensive system to tell me anything.